Ladder platform and roof jack



0.1. AND. u. 1. MOHR. LADDER: RLATFORMAND-ROOF JACK. APPLICATION FI I;EDNOV- 1, i920. 1 4257 5 Patented July 25, 1922.

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- C. J. AND U J. MOHR.

LADDER PLATFORM AND ROOF JACK.

APPLICATION FILED NOV. 1. 1920.

1 428325. Patented July 25', 1922.

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entrain CARL J'. MOHR AND URBAN J'. MOI-IR, OF DAYTON, OHIO.

' LADDER, PLATFORM AND ROOFJACK.

Specification of Letters Patent.

Patented July 25, 1922.

Application filed November 1, 1920. Serial No. 1,021.

' To all whom it may concern: I

Be it known that we, CARL J. Mona and URBAN J. MOHR, citizens of theUnited States, residing at Dayton, in the county of Montgomery and Stateof Ohio, have invented certain new and useful Improvements in LadderPlatforms and Roof Jacks, of which the following is a specification,reference being had to the accompanying drawings The purpose of thisinvention is to provide an improved ladder platform and roof jack,especially designed for use by painters and the like, and by mechanicsand carpenters when shingling roofs,

A further purpose is the provision of a ladder platform and roof jackespecially designed to engage any one of the run 's of the ladder andrest against the side rails of the ladder and provided with sharpened.portions to pierce the side of the house,'so as to sup-port the platformin position on the ladder. It is possible to employ two ladders withplatforms at the top or intermediate the top andbottom, or at the topand intermediate the ends of the ladders, in combination with anadditional platform or platforms extending from the platforms of oneladder to the platforms of the other ladder, in order to facilitate thepainting of the side of the house. 7

lVith a ladder platform androof jack of this kind it has been found thata house or cottage can be painted substantially twice as quick as withthe old method.

A further purpose is to provide a ladder platform especially adapted foruse in connection with a single ladder, enabling the painter to stand onthe platform instead of on the rungs, when painting a window section andthe like, thereby avoiding the danger of the ladder sliding either wayfrom under the painter.

As a still further purpose it is the aim to provide a ladder platformconsisting of angle iron brackets, so constructed and put together as toenable the brackets to engage the side rails of the ladder, there beingmeans carried by the brackets to overlie the rungs of the ladder, incombination with boards or the like connecting the two brackets, inorder to reinforce the structure and'insure rigidity.

Additionally the invention aims to provide a ladder platform which maybe used as a roof jack, in order to facilitate the shingling of, roofsand performing like work on cottages and the like.

l Vhile the design and construction at present illustrated and set forthis deemed preferable, itis obvious that as a resultiof a reduction ofthe invention to a more practical form for .commerical purposes, theinvention may be susceptible of changes, and the right to these changesis claimed, provided they are comprehended within the scope of what isclaimed.

The invention comprises further features and combination of parts, aswill be hereinafter set forth, shown in the drawings and claimed.

In the drawings Figure 1 is a view showing the application of the ladderplatforms on a pair of ladders, with extra platforms bridging from theladder platforms, whereby the side of the house or cottage may bepainted.

Figure 2 is a view showing the single ladder platform asmounted on aladder under a window, for the purpose of painting the sash.

Figure 3 is a view in elevation of a house at right angles to that shownin Figure 1, showing an additional platform connecting the ladderplatforms.

Figure at is an enlarged detail perspective view of the device ready foruse as a roof jack.

Figure 5 is a view in elevation showing a platform connecting two of theroof acks,

Figure 6 is a sectional view of the roof jack, showing it as applied toa ladder.

Referring more especially to the drawings, designates a roof jack as awhole, whlch comprises a pair of brackets 2,; which may be any suitableshape or contour, but

preferably as shown. Each bracket comprises an angular support, which isconstructed of angle iron bent npon itself as at 3, in order to affordthe braces 4: and 5,

which extend at an acute angle. The angle of the braces may be increasedor decreased, according to the desired proportions for the bracket. Inbending the angle iron the flange 6 is cut or severed as at 7, so thatwhen the angle iron is bent, the severed edges of the two portions ofthe flange 6 will abut, as shown clearly in the drawing. An angle iron 8is disposed transversely between the two braces 5 of the two brackets.This angle iron 8 has the ends of one of its flanges bent laterallythereof forming ears 9, which are bolted or otherwise secured to theflanges 6 of the braces 5, thereby rigidly reinforcing the two bracketsrelatively to each other.

An angle iron 10 is disposed so that one of its flanges extendsdownwardly, and the other flange extends laterally, and is arrangedrelatively to the angle braces 4: and 5, so that the downwardlyextending flange of the brace 10 will engage the corresponding flangesof the braces a and 5. Furthermore the brackets of the roof jack andladder platform are disposed, so that the horizontal flanges of theangle irons 10 of both brackets will extend toward each other.

The horizontal flanges of the angle iron braces 10 at their outer endsare extendedbeyond the downwardly extending flanges to provideextensions 11, which are curved to form hooks, to engage over any one ofthe rungs of a ladder 12.

The reason for disposing the angle iron braces 10 as was described andshown, is to enable the extensions 11 to engage any one of the rungs ofthe ladder, and at the same time permit the braces a to engage cer-.tain edges of the side rails of the ladder. In other words the angleiron braces 10 are disposed horizontally to the angle irons or thebraces t and 5, in order that the two brackets may be supported upon theladder with relative rigidity and strength.

The inner ends of the horizontal flanges of the angle iron braces 10 areslightly extended, and are sharpened as shown at 13, for the purpose ofpiercing the side or the wall of a house or cottage, thereby preventingdisplacement of the ladder platform.

Boards or other suitable strips 14L connect the horizontal flanges ofthe angle iron braces 10, there being screws or the like 15 engagingthrough the horizontal flanges to secure the boards or strips in place.The angle iron braces 10 are connected to the. upper ends of the braces4 and 5 as shown at 16. i

As shown in Figures 1 and 3, it will be noted that the ladder platformsmay be arranged on any of the rungs of the ladders, and in someinstances may be arranged upon the intermediate rungs, or on the toprungs, with connecting platforms 17 resting upon the ladder platforms.

The braces 5 of each ladder platform are provided with sharpened pins 18passing through the lateral flanges, there being nuts 19 threaded uponthe pins to hold them in place. The sharpened ends 20 of the pins aredesigned to pierce the lower stretch of a house, when the platform isused as a roof jack, thereby preventing the roof jack, from slipping.

The ladders to be used in connection with the ladder platform have theirlower ends provided with metal shoes 21 having teeth 22, so as toprevent slipping of the ladder, even when engaging the ground, or whenengaging the lower stretch of a house roof.

The invention having beenset forth, what is claimed as being'usefulis 1. As an article of manufacture, a ladder platform and roof jackcomprising angle bars adapted to assume substantially horizontalpositions with their lateral flanges facing toward each other, certaincorresponding ends of the bars havingmeans to engage the rung of aladder, angle braces composed of angle bars and having theircorresponding ends secured to the vertical flanges of the horizontalangle bars, said angle braces extending downwardly and having theirlateral flanges extending outwardly in opposite directions, and atransverse brace connecting the angle braces, spacing them substantiallyequal to the distance between the side rails of a ladder, whereby theoutward lateral flanges of certain arms of the angle braces may overlieand engage the side rails of the ladder.

2. A combined ladder platform and roof jack, comprising angularbrackets, said brackets each comprising an angle brace composed of anangle bar bent upon itself to provide two arms, a brace secured at itsrespective ends to the angle braces adjacent the bends thereof, saidbrace being of a length to hold said angle braces spaced substantiallyequal with the side rails of a ladder, whereby certain arms of saidangle braces may engage said side rails, bars arranged on the innersides of the angle braces, one connecting the ends of the arms of eachangle brace, said last named bars having hooks at certain of their ends,the arrangement and construction of said last named bars beingsuchrelative to the angle braces, whereby said last named bars mayassume positions between the side rails of the ladder, whereby the hooksmay engage the rung thereof.

3. A combined ladder and roof jack, comprisingbrackets, said bracketseach comprising angle braces, a bar connecting the lower ends of saidangle braces and holding them spaced equal to the spacing of the siderails of the ladder, whereby certain arms of the angle braces may engageand rest upon said side rails, bars each connecting the upper parts ofsaid angle braces, and having a transverse supporting members may resthook at one of its ends, the construction and upon said brackets.arrangement of said last named bars being In testimony whereof Wehereunto alfix 10 such with relation to the inner upper faces oursignatures.

5 of the angle braces, whereby the hooks may engage the rung of theladder, With the CARL J. MOI-IR, braces in engagement With said rails,so that URBAN J. MOI-IR.

